package com.example.demo.config;

import com.example.demo.common.AppVariable;
import com.example.demo.entity.Userinfo;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * @Author：徐志荣
 * @Date：2023/6/28 下午 5:21
 */

// 登录拦截器
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if(session != null && session.getAttribute(AppVariable.USER_SESSION_KEY) != null){
            //用户已登录
            System.out.println("当前登录用户为 : "+
                    ((Userinfo)session.getAttribute(AppVariable.USER_SESSION_KEY)).getUsername());
            return true;
        }
        //用户未登录
        response.sendRedirect("/login.html");
        return false;
    }
}
